Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Monitoring Technique and Device of Surface Contamination for Line-Post Insulator

지지애자의 표면오염 모니터링 기술 및 장치

  • Kil, Gyung-Suk (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Park, Dae-Won (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Jung, Kwang-Seok (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Kim, Sun-Jae (Division of Electrical and Electronics Engineering, Korea Maritime University) ;
  • Seo, Dong-Hoan (Division of Electrical and Electronics Engineering, Korea Maritime University)
  • 길경석 (한국해양대학교 전기전자공학부) ;
  • 박대원 (한국해양대학교 전기전자공학부) ;
  • 정광석 (한국해양대학교 전기전자공학부) ;
  • 김선재 (한국해양대학교 전기전자공학부) ;
  • 서동환 (한국해양대학교 전기전자공학부)
  • Published : 2010.05.01
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Abstract

Line to ground faults by deterioration of insulators has frequently occurred in power system, and the main cause is surface contamination of the insulators. The contamination of insulator is analyzed by monitoring the surface leakage current flowing them. The suspension insulator is monitored by installation of a zero-phase current sensor(ZCT), but the line-post insulator is impossible to apply the same method because of its large diameter structure. This paper proposed a detection method of surface leakage current for a line-post insulator, and it can easily be applied to new and/or built insulators. The leakage current is indirectly calculated from the potential difference between the metal electrode attached on the surface of insulator and the ground connector. To evaluate the performance of the proposed method, the leakage current is compared as a function of contamination condition controlled by the density of NaCl solution. The leakage current is proportioned to the density of NaCl solution, and the voltage detected by the electrode showed the same trend. From the experimental results, we designed and fabricated a monitoring device which is composed of a detection electrode, signal converter, microprocessor, and ZigBee, and its measurement range is $10{\mu}A{\sim}5mA$.

Keywords

References

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